Question

I want to replace question mark character ? with text Rs if ? is followed by numbers.

This is what I have tried. But not working.

 string str = "DFg sdfsdaf ?145 dfgsdf ?fg";
 str = str.Replace(@"\\?", "Rs");
 Console.WriteLine(str);

Desired output:

DFg sdfsdaf Rs145 dfgsdf ?fg

Please help.

Answer 1

Try like this too:

System.Text.RegularExpressions.Regex.Replace(str,@"\?(?=\d+)","Rs");

I would recommend this read. The above pattern looks for ? and checks if it is followed by digit one or more time then replaces ? with Rs.